21162650642527 has 2 divisors, whose sum is σ = 21162650642528. Its totient is φ = 21162650642526.

The previous prime is 21162650642447. The next prime is 21162650642603. The reversal of 21162650642527 is 72524605626112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21162650642527 - 2¹¹ = 21162650640479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21162650642327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581325321263 + 10581325321264.

It is an arithmetic number, because the mean of its divisors is an integer number (10581325321264).

Almost surely, 2^{21162650642527} is an apocalyptic number.

21162650642527 is a deficient number, since it is larger than the sum of its proper divisors (1).

21162650642527 is an equidigital number, since it uses as much as digits as its factorization.

21162650642527 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 21162650642527 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty million, six hundred forty-two thousand, five hundred twenty-seven".